Answer:
Step-by-step explanation:
Given: Trey's test score average decreased by 14 points this semester.
To find: a signed number to represent this change in average.
Solution:
The decrease can be denoted by minus 
sign and increase can be denoted by plus 
sign.
So, a signed number to represent the change in test score average is
To find the answer you have to use pythagorean theorem;
a² + b² = c² where a and b are the legs and c is the hypotenuse.
5² + 15² = c²
25 + 225 = c²
250 = c²
√250 = √c²
√250 = c
hope this helps, God bless!
Answer:
B. -8
Step-by-step explanation:
The amount Tyshawn earn per hour is $13.5
<h3>Ratio and proportion</h3>
Fractions are written as a ratio of two integers
If after working 80 hours at his job, Tyshawn earned a total of $1080, then;
80 hrs = $1080
In order to calculate the amount earned per hour
Amount per hour = 1080/80
Amount per hour = $13.5
Hence the amount Tyshawn earn per hour is $13.5
Learn more on ratio here: brainly.com/question/25927869
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